ADI. — CHR.J 



INSECTA. 



575 



Family Phthanocorid.*:. — Phthanocoris. 



Family Protophasmid^e. — Haplophlebium, Paolia, Titanophasma. 



Family Xenoneurid.e. — Geroneura, Xenoneura. 



Family Uncertain. — Archegogryllus, Dyscritus. 



Supposed Insect Trails. — Haplotichnus, Plangtichnus, Treptichnus. 



Adiphlebia, Scudder, 1884, Mem. Bost. Soc. 

 Nat. Hist., vol. 3, p. 345. [Ety. a, pri- 

 vative ; dis, double; phlebion, vein.] 

 Body rather stout ; wings rather broad ; 

 all the nervules simple, arising from 

 their stems near the base of the wings ; 

 subparallel and longitudinal. Type 

 A. lacoana. . 



lacoana. Scudder, 1884, Mem. Bost. Soc. 

 Nat. Hist., vol. 3, p. 345, Coal Meas. 

 Aethophlebia, Scudder, 1884, Mem. Bost. 

 Soc. Nat. Hist., vol. 3, p. 338. [Ety. 

 aethes, strange ; phleps, a vein.] Inter- 

 no-median vein terminating before the 

 middle of lower border, emitting a 

 single main branch, beyond its middle 

 which is superior, and which, with me- 

 dian fork of externo-median and larger 

 part of main scapular branch, form a 

 continuous adventitious vein crossing 

 principal nervules of the wing; ulti- 

 mate offshoots of externo-median vein 

 arise indifferently from the main vein 

 and the principal branch, and are 

 parallel and similar to the offshoots of 

 the veins above. Type A. singularis. 

 singularis, Scudder, 1884, Mem. Bost. Soc. 

 Nat. Hist., vol. 3, p. 338, Coal Meas. 

 Anthracothremma, Scudder, 1884, Mem. 

 Bost. Soc. Nat. Hist., vol. 3, p. 327. [Ety. 

 anthrax, coal ; thremma, reared.] Body 

 stout ; prothorax several times broader 

 than long ; wings subequal and elon- 

 gated ; scapular vein arcuate and nearly 

 reaching the tip ; externo-median vein 

 with numerous parallel branches, 

 mostly simple. Type A. robusta. 

 robusta, Scudder, 1884, Mem. Bost. Soc. 

 Nat. Hist., vol. 3, p. 327, Coal Meas. 

 Archegogryllus, Scudder, 1868, Proc. 

 Bost. Soc. Nat. Hist., vol. xi, p. 401. 

 [Ety. archegos, first in time ; gryllus, a 

 cricket.] Relations not clearly under- 

 stood. Type A. priscus. 

 priscus, Scudder, 1868, Proc. Bost. Soc. 

 Nat Hist., vol. 11, p. 401, and Mem. Bost. 

 Soc. Nat. Hist., vol. 3, p. 323, Coal Meas. 

 Archimylacris, Scudder, 1868, Acad. Geol., 

 p. 388. [Ety. arche, beginning ; Myla- 

 cris, cockroach.] Mediastinal area com- 

 paratively short ; 

 scapular terminat- 

 ing below the tip, 

 and with the ex- 

 tern o-median, 

 which is com- 

 paratively small, 

 occupying less 

 than half the 

 wing; internomedian vein compara- 

 tively long. Type A. acadicum. 



Fig. 1074.— Archimyla 

 cris acadicum. 



acadicum, Scudder, 1868, Acad. Geol., p. 

 388, Coal Meas. 



parallelum, Scudder, 1879, Mem. Bost. 

 Soc. Nat. Hist., vol. 3, p. 85, Coal Meas. 

 Blattina, Burmeister, 1838, Handbuch der 

 Entomologie. [Ety. Blatta, a cockroach.] 

 A living genus of cockroaches, raised 

 to the rank of a family, and by some 

 naturalists to the rank of an order, to 

 which the name Dictyoptera has been 

 applied. It is not a Palaeozoic genus. 



bretonensis, see Mylacris bretonense. 



fascigera, see Gerablattina fascigera. 



heeri, see Mylacris heeri. 



sepulta, see Petrablattina sepulta. 



venusta, see Etoblattina venusta. 

 Cheliphlebia, Scudder, 1884,|Mem.jBost.Soc. 

 Nat. Hist., vol. 3, p. 328. [Ety. chele, 

 forked ; phlebion, vein.] Body rather 

 slender, but wings large and coarse, 

 without cross veins , interno-median 

 vein extending far toward the tip of the 

 wing with many 

 oblique branches. 

 Type C. elongata. 



carbonaria, Scudder, 

 1884, Mem. Bost. 

 Soc. Nat. Hist., vol. Fig. 

 3, p. 328, Coal Meas. 



elongata, Scudder, 

 1884, Mem. Bost. Soc.Nat. Hist., vol. 

 3, p. 328, Coal Meas. 

 Chrestotes, Scudder, 1868, Geo. Sur. 111., 

 vol. 3, p. 567. [Ety. chrestotes, good of 

 its kind.] Wings short, broad, well 



1075. — Cheli- 

 phlebia carbona- 

 ria. 



Fig. 1076.— Chrestotes lapldea. 



rounded ; vena scapularis throws sev- 

 eral branches downward, commencing 

 before the middle of the wing, and with 

 its branches occupies the upper two- 



